[PATCH] ppc64: reduce stack overflow warning threshold

Reduce the stack overflow warning from 4kB to 2kB now that its been in and
tested for a while.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/arch/ppc64/kernel/irq.c b/arch/ppc64/kernel/irq.c
index 8461687468643a0f1fcd27b309c99f3a6443a11f..eec2050ceb7303f34998bc93a6f6da4218c6bab3 100644 (file)
--- a/arch/ppc64/kernel/irq.c
+++ b/arch/ppc64/kernel/irq.c
@@ -586,13 +586,13 @@ void do_IRQ(struct pt_regs *regs)
        irq_enter();
 
 #ifdef CONFIG_DEBUG_STACKOVERFLOW
-       /* Debugging check for stack overflow: is there less than 4KB free? */
+       /* Debugging check for stack overflow: is there less than 2KB free? */
        {
                long sp;
 
                sp = __get_SP() & (THREAD_SIZE-1);
 
-               if (unlikely(sp < (sizeof(struct thread_info) + 4096))) {
+               if (unlikely(sp < (sizeof(struct thread_info) + 2048))) {
                        printk("do_IRQ: stack overflow: %ld\n",
                                sp - sizeof(struct thread_info));
                        dump_stack();
@@ -629,13 +629,13 @@ void do_IRQ(struct pt_regs *regs)
        irq_enter();
 
 #ifdef CONFIG_DEBUG_STACKOVERFLOW
-       /* Debugging check for stack overflow: is there less than 4KB free? */
+       /* Debugging check for stack overflow: is there less than 2KB free? */
        {
                long sp;
 
                sp = __get_SP() & (THREAD_SIZE-1);
 
-               if (unlikely(sp < (sizeof(struct thread_info) + 4096))) {
+               if (unlikely(sp < (sizeof(struct thread_info) + 2048))) {
                        printk("do_IRQ: stack overflow: %ld\n",
                                sp - sizeof(struct thread_info));
                        dump_stack();